Tests: wait until stats are published, not just collected on the agent (backport #12501)#12505

michaelklishin merged 2 commits intov4.0.xrabbitmq/rabbitmq-server:v4.0.xfrom

mergify/bp/v4.0.x/pr-12501rabbitmq/rabbitmq-server:mergify/bp/v4.0.x/pr-12501Copy head branch name to clipboard